This is a back to basics release that presents all 10 tracks in the regular netBloc format. However, this release also features publicly available photography from the Library of Congress’ extensive catalog. Not in the public domain, but available for non-commercial use is the ground-breaking photography of Sergei Prokudin-Gorskii. In 1905 he was the first person to develop a way to take color photos. He used a rapid succession of three monochromatic photos, each through a different color filter — red, green and blue — to achieve his goal. In the PDF I link to a great wikipedia article about him and his technique. You’ll also find a link to the Library of Congress’ Prokudin-Gorskii gallery. That is definitely worth a look.